EXH0648024698

PCHBPollution Control Hearings Board of the State of Washington

p Paramet fix, !nc. con.u ,nt,inEngineering andEnvironmentalSciences 5808LakeWashingtonBlvd.NE, Suite200,Kirkland,WA98033-7350 425-822-8880• Fax:425-88_-8808 MEMORANDUM Date: April 5, 2000 To: Paul Fendt _._ From: Michael Kiuck and Stuart Currie Subject: Port of Seattle Roofing Options cc: Linda Logan Ken Ludwa Project File Project Number:. 555-2912-001 (61) Project Name: Port of Seattle - This memorandum summarizes research into potential roof coverings to prevent the leaching of zinc from the galvanized steel roofs of two warehouses located on property owned by the Port of Seattle at the Sea-Tat airport. Introduction Research into industrial roof coatings was .performed in three ways. First, this issue was discussed with a representative of Stevens Roofing Systems who had previously attended a Port meeting. Second, Intemet searches were conducted using various keywords and the resulting companies contacted for more specJfic information. Third, local roofing companies that advertised commercial roofing experience were contacted by telephone. Sources for which information was obtained is summarized in Tabte 1 (note that many contacts did not respond to requests for information). Results Aftercompiling notes from multiple phone calls, Intemet printouts, facsimiles, and information received in the malt, we identified several options for covering the roofs. Paint systems and synthetic coverings were the most common options recommended by nearly every company contacted. Paint systems typically involve a surface preparation step (pressure washing or rust treatment), followed by application of a primer, and one or two coats of an acrylic, urethane, or epoxy topcoat. Synthetic coverings include options such as spray-on primer/elastomer coatings with sealants for joints,…
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